EL ENLACE PUEDES PONER LO QUE QUIERASY AQUI EL MENSAJE EMERGENTE
<style type="text/css"> a { text-decoration: none; position: relative; }
a span { text-decoration: none; width: 100px; height: auto;
line-height: 20px;
padding: 10px;
font-size: 14px;
color: #719DAB;
text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.1);
text-align: center;
border: 4px solid #fff;
background: rgba(255,255,255,0.9);
border-radius: 5px;
pointer-events: none;
position: absolute;
left: 0; bottom: 200px;
opacity: 0;
box-shadow: 1px 1px 2px rgba(0,0,0,0.1);
-webkit-transition: all 0.3s ease-in-out;
-moz-transition: all 0.3s ease-in-out;
-o-transition: all 0.3s ease-in-out;
-ms-transition: all 0.3s ease-in-out;
transition: all 0.3s ease-in-out; }
a:hover span { opacity: 0.9; left: 50%; bottom: 10px; color: #000000; } </STYLE>